From a iMdy Correspondent. On the 24th day of July last, your correspondent and better half, bidding adieu, for the nonce, to the claasic precincts of the university of Michigan, took the inorning train for Detroit," en route to the Northern lakes of Michigan. The day was hot and duaty ; but mid f riends and cheap excuraions to and fro from Detroit, and the Canadian shore, with a slight divergence to Belle Isle, where we "took in" the celebrated "all around" shot of the world, Col. Ira B. Paine, in his wonderful feats of general shooting, etc, we managed"to drive dull care away,"and at 100 degrees in the cool quiet of a summer's evening we found ourselves snugly ensconCed on th6 good old steamer Saint Paul, in charge ofCapt. Boyington, bound for the salubrious and anti-hay fever climate of Northern Michigan. Our passage through the straits and the canal was to the novitiate a beautiful and cnarmmg signt, and we eau never forget the effect displayed on that delightful and ner?ebracing nighl. In the "wee sina tl 5urs"of the morning we sought that sweet sleep that "knits up;(the ravelled sleeve of care" to wake in the morning tied up to the wharf at Port Huron. Here we look on board another of our party and after exchanging congratulations, sat down to our matutinal meal while our good old steamer was ploughiug her way through the oft times "turbulent" Huron- butnow placid and calm, its surface like an immense mirror, stretching out "huge and wide" before us till we arrived at Saginaw Bay, where we encountered one of the usual thunder squalls that infest that locality. Por a time our staunch old steam er rolled and rocked, but pressed onward through the stormlashcd waves. and a few of our goodly passengers feit that terrible commotion in the stomach that denotes old Nep tune's anger;but in a short time the clouds cleared away, the seas became more calm, and stomachs gained their usual receptivity. On bright and beautiful Monday morning we landed at busy Alpena, and passed Ihe day taking in a cargo of lumber. Inquisitively we strolled around and took in the sights and lions of the „city.'.with its treets made of saw dust, its sandy lawns and pine laid sidewalks and extensive milis with their champagne bottle furnaces. All here is a continuous din, and the mili musie of the ceaseless saw, and business and activity everywhere, is truly ülustrative of an American city amid primeval forests of pine. Everywhere you sec immense piles of lumber, and busy arms are impatiently at work piling higher and higher till you can 't, see the city for its piny mouutains. Here we met our genial and hospitable friend, exRegent Maltz, who still shows a deep and abiding interest in the grand old university.and question succeeded questionas to its present aud prospective status. Of course we gave him cheering words and encouraging reports. Col. Grosvenor and daughter were passengere to this place. The colonel occupied his long day on shore ia arguing an important case before the courts. The latter part of the day we spent in examining into the fishing interest wliich is conducted here ou a large scale; between four and six tons of white flsh and lake trout being shipped daily to Detroit from whenee they are distributed to all parts of the country. These tish are taken by seines suuk in the deep waters of Lake Huron, and four tug boats are empioyed to bring in the rich cargoes of these luscious captives. Large bums of money are invested in tbis enterprize from which golden harvests are reaped annually. About 100 hands are in constant employmenl in catching, cleaning, packing, shipping, and mending nets, which make up the;matters of detail in this large and increasing business. About 9 o'clock in the evening, tired out but elated at the grand success of our "ground and lofty tumbling" over piles of lumber and acres of floating logs, we bid adieu to the Forest city amid dulcet sounds of '-rausic by tlie band" on board, and all night we steamed along towards Cheboygau, the terminus of our trip, which we reached in the grey of the next morning. Transferring our baggage to the inland steamer "Northern Belle" and bidding our gallant captain and general passengers a bon voyage, we were soon off for Indian River where we proposed to camp for the season, by the inland route to Petoskey traversing the beautiful rivers and lakes that form this important highway from Lake Huron and Lake Michigan. A mile from the city of Cheboygan we enter the lock that gives us free entrance to Cheboy gan river that runs unvexed to Mullet Lake upon whose forest-clad banks has been receutly erected the Mullet Lake house, an elegant foui-storied structure, built by the enterprising firm of Smith brothers.for the comiort of the insatiable angler the tourist, and the hay fevente. Here wc took dinner, a hungry party of not less Ihan 50, whose appetites sbarpened by the cool, braciog breezes from forest and stream,could brook nodelay, and we soon demolished the plentiful supply of edibles set before us. The shrill whistle sounds, we are hurried on board and cast loose for our destination. At the foot of Indian River our attention is called to an unfinished bridge croKing the river, over 1,200 feet lo" built by the township and is the only means of communicationfrom this portion of the country to Cheboygan certain seasonsof the year. We pass underits centre span, steam up this narrow and crooked strearn and arrive affcjmith's Landing," where we disembarkd.to temporarily preempt enough of its sandy surface for our camphome. (My next about the fishing etc, I will send in a few days.